Many times you need to know the password or network key of the WiFi network with which you are connected, we had already shared a freeware app with you which allows you to do so.
But if you are tech geek and looking to do without any app then you will be happy to know that Windows Command Line allows you to do so.
If you want to know your WiFi password then open Command Prompt by typing cmd in run command and type following command in it
netsh wlan show profiles name=[profile name] key=clear
It will show all details of your WiFi network along with password under Security Settings.